Still and circulating pump therefor



y 1934. A. HOLLANDER 1,959,000

STILL AND CIRCULATING PUMP THEREFOR Filed Aug. 10, 1931 2 Sheets-Sheet 1May 15, 1934. A. HOLLANDER STILL AND CIRCULATING PUMP THEREFOR FiledAug. 10. 1931 2 Sheets-Sheet 2 EU UH gwuwwfoz Patented May 15, 1934UNITED STATES PATENT FFICE Aladar Hollander, Pasadena, Oalifl, assignorto Byron Jackson 00., Los Angeles, Calif., a corporation of DelawareApplication August 10, 1931, Serial No. 556,077

4 Claims.

This invention relates to a still, such as used for distillingpetroleum, and to a circulating pump combined with the still.

In certain stills, such, for example, as the stills 6 employed incracking petroleum oil, it is desired to circulate forcibly and rapidlythe liquid undergoing distillation. Heretofore, stills of this type havebeen provided with a vertical leg leading to a horizontal drum, and inorder to secure rapid 10 circulation from the upper drum to the lowerhorizontal drum a pump has been placed on the vertical leg. The pumphere offers an obstruction to the passage of liquid from the upper tothe lower drum and decreases the capacity of the vertical leg.

An object of the present invention is to provide a construction by whichthe pump may be located in the lower horizontal drum so as to leave thevertical leg without obstruction so that it can be used as a suctionpipe of ample capacity.

It is the general object of the present invention to provide a stillconstruction including a circulating pump by which the contents of thestill may be rapidly moved or circulated in operation.

A further object of the present invention is to provide a form ofcirculating pump for a still which will have an increased efficiencyover those now in use.

The present invention, together with various objects and advantagesthereof, will best be understood from a description of a preferred formand example of still with a circulating pump embodying the presentinvention. For this purpose, hereafter described with reference to theaccompanying drawings is a preferred example of the invention.

In the drawings Figure 1 is an elevation of the still.

Figure 2 is a section on the line 22 of Figure 1.

Referring to the drawings, the still comprises an upper horizontal drum2, provided with two vertical drums 3 and 4, each in turn terminating attheir lower ends in horizontal drums 5 and 6,

respectively, which are directed transverse to the drum 2. The drum 5 islocated somewhat above the drum 6, and between the drums 5 and 6 thereis a bank of tubes 7 which serve as heating tubes, by means of which theliquid in the still may be heated by hot gases or other sources of heatbrought in contact with the tubes 7.

Now, referring more particularly to Fig. 2 of the drawings, the lowerdrum 6 of the still is pro-' vided with a circulating pump 8, which isprovided with two propellers 8 and 9. The pump 8 is provided with alateral intake neck 10, which is secured to the lower end of a drum 11constituting a continuation of the drum 4, so that the liquid from thestill 2 in passing through the heating coil '7 passes down the leg 4 andis directed into the pump 8. Preferably, suitable packing glands 12 areprovided for making fluid-tight connection between the inlet 10 and thedrum section 11.

The pump 8 includes a central case member 13, which is provided with acentral curved partition 14 forming two outlet passages for fluidentering the pump from the suction chamber provided by the drum section11. The curved partition 14 also provides a bearing 15 for a pump shaft16 which carries the impellers 8 and 9. The pump shaft 16 extendsthrough the head 1'7 of the drum 6, and the head of the drum supportsthe housing 18 of an electrical motor of any desired or preferred form.The shaft 16 is provided with a suitable packing gland 19 for a passagethrough the header 17.

The pump 8 also includes two discharge casings 20 and 21, respectively,housing the impellers 8 and 9, respectively, and directed to- Wardsopposite ends of the drum 6. These discharge casings also include guidevanes 22 and 23, respectively, the function of which is to take thevortex motion from the liquid discharged from the pump, so that when theliquid is discharged into the drum 6 from the pump there will be nolarge velocity head losses.

By the apparatus thus described a powerful circulation of liquid in thestill and through the tubes 7 may be attained with a low consumption ofpower for operating the pump.

What I claim is:-

1. A still comprising a main distilling chamber having two dependinglegs, horizontal drums connected to said legs, heating pipes connectingsaid horizontal drums, and a circulating pump disposed in one of saidhorizontal drums, said drum having a larger diameter than said legs,said circulating pump having an inlet connected with the leg leading tosaid drum and having propellers mounted on horizontal axes at each sideof said inlet for discharging fluid horizontally towards the ends ofsaid drum.

2. A still comprising a main drum and a heating system including twolower horizontal drums interconnected by heating tubes with legsconnecting the respective lower drums with the main drum, one of saidlower drums enclosing a horizontally disposed impeller pump, said drumhaving a larger diameter than said legs, an inlet for said impeller pumpconnecting one of said legs with said pump, and discharge casings forsaid impeller pump arranged to discharge horizontally into itssurrounding drum and provided with diffuser vanes.

3. A still comprising a main drum and a heating system including twolower horizontal drums interconnected by heating tubes with legs connecting the respective lower drums with the main drum, one of said lowerdrums enclosing a horizontally disposed impeller pump, said drum havinga larger diameter than said legs, an inlet for said impeller pumpconnecting one of said legs with said pump, discharge casings for saidimpeller pump arranged to discharge horizontally into its surroundingdrum and provided with difiuser vanes, and an operating shaft for saidimpeller pump extending horizontally through the drum enclosing the pumpand provided with a driving motor mounted upon said drum.

4. A still comprising a main drum, two depending legs from said maindrum, horizontal drums connected with ends of said legs, heating tubesconnecting said horizontal drums, and a circulating pump mounted withinone of said horizontal drums, said drum having a larger diameter thansaid legs, an inlet from the leg leading through said drum to said pump,propellers mounted upon a common horizontal axis disposed at each sideof said inlet, and discharge casings for said impellers including guidevanes operative to remove vortex motion from the liquid and dischargethe same towards the ends of said pump enclosing drum.

ALADAR HOLLANDER.

